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INVENToR a T1 M El arma 5- Ela GUN

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G. M. BARNES Filed Dec. l0. 1930 llh IIIVI 1 l Ml m.. Q T8 AJN .l 7 11.7.

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Patented sept. 13, 1932 remis y PTF-Nlf y GLADEON M. BARNES, or` THE UNITED safaris ARMY, 'ruis'.rrNes`,` MICHmN GUN Appiication med :Deeemter 1o, i930.4 "serial No.f5o1,325.

(GRANTED UNDER THE Acr or MARCH e, issaas AMENDED APRIL 30, 192s; 37e o. e. 757) The invention describedA herein may be manufactured and used by or for the AGrovernmentV for governmental purposes, without the payment to me of any royalty thereon. 5 This invention relates to guns and, more particularly, it has reference to that class of guns wherein a portion of the powder gases of discharge are utilized for retarding the recoil movement of the gun, being comu presesd inthis operation and made available `for restoring the gun tobattery.

The gun forming the subject matter of the present invention is characterized by the as' sociation of a novel type of muzzle brake 5' with a cylinder for collecting the deflected gases for compressiveaction and reaction.

To these and other ends, the invention consists in the c0nstruction, arrangement and combination of elements described here- :0 inafter and pointed out in the claims forming a part of this specification.

A practicalembodiment of the invention is illustrated in the accompanying drawing, wherein:

Fig. 1 is a more or less diagrammatic l illustration in the nature of a longitudinal sectional view through a gun exempliying the principles of the invention;

Fig. 2 is a sectional view on the line 2-2 Fig. 3 is a longitudinal sectional view showing a modied arrangement of the inletfvalve.

Referring to the drawing by characters i5 of reference There is shown a gun 5 of the reciprocating type arranged to slide in a cradle, a portion of which is indicatedat 6; A cylinderY 7` forwardly connected to the gun by means D fof a hanger 8 is also secured to the gun lug 9 through its rear head 10 and the nut 11 so that it partakes of the movement of the gun. y. An imperforate casing 12 mounted on the muzzle of the gun and secured thereto in any L5 Vconvenient manner, specifically vby a pin 13,

ber 16 `is normally is communication through :aipipe 14 a passage 15 in a valve block formed by the `hanger v 8. This passage leads to a valve chamber 16 which in turn is open to a port 17 in the cylinder.` A valve 184m the chamvheld in the open position by its spring 19, eing limited inmovement `by the engagement withthe valve block of ainut V20 on the `outer Vend of thev valve stem.

Within thejcasing 12 there are a series of baiiie `rings 21 centered by means of laterally projecting lugs 22 and held in spaced relation with respect to eachV otherbyaxially project- `ing lugs 23. The innermost ring 21a 1s spe,-

cially shaped to' abut the end of the gun and attachment to the cradle 6 works inthe cylinder 7 and has its head 25a normally positioned at the rear ofthe cylinder when the gun isin battery. A passage 26 in the lpiston head is controlled by .a valve 27 to regulate the volume of gas permitted to pass from the `compression chamber 28 to the low pressure side of the piston where a buer chamber 29 vided with a relief valve 30. il y In the arrangement "shown in Fig. YJr-the valve 31, corresponding to the valve 18 of is established. Y The buffer chamber is pro- `Fig. '1, has been reversedto position the valve `stem 32 and the spring 33 outside of the valve block so that they will not bein contact with theV hot powdergases passing through the .valvechamberl n l VV'In operatiom'when the gun is ired,the gases of discharge enter the casing 12, e2:-`

pand rapidly and are deflected to the rear by rthe baiiie rings 21.' Thel action in checking sure in the cylinder exceeds the vrapidly Vthe energy of recoil ofthe gun is the same as obtains in the conventional muzzle brakes. However, the deflected gases, instead of being Y vented directly to atmosphere VWhere they interfere with the gun crew andgive rise to f Vclouds of dust,V are delivered to the cylinder 7, entering past the normally open valve 18. Y During the initial stage of recoilV the pres-V de- Y creasing pressure inthe casing l2 and eiects the closing'of the valve. Thereafterthe gases confined in the cylinder Will'be compressed as the OI'Ward end of the cylinderappraehes Y y j the stationary pistonhead a, acting to deflected bythe baiie rings and delivered through the passage.

' 6. In a reciprocating gun, an imperforate casing secured to the muzzle of the gun and having "a' rearwardly directed passage,

bafliing means in the casing for reversing the direction of the gases of discharge, a receptameans for delivering the collected Ygases Vtoa movable part of the gun.

` GLADEON M. .BAR-NES.

yieldingly check the recoil of the gun and reacting to return'the gun into battery. A"

portion of the gasesgpermittedto enter :the bufferchamber 29 through the valve passage 26 will becompressed onthe counterrecoil f strokethereby easing the gun into battery.

The cylinderis relieved through the valves 18 and 30. Y

Y ,It isV to be understood that in a gun employing an evanescent medium in the recoil and counterrecoil mechanism, some provision Ais to be made for holding thegun in battery. I claim V:V

i l. In a reciprocating-gun, a cylindermov- Vable with the gun, a stationary piston in the Vcylinder, a valve block on the cylinder, a

chamber in the block having communication with the cylinder, al normally open valve in A -I Nthe chamber, and a Inuzzle'brake .on'the gun delivering gases of discharge to the chamber in the valve block.

.2. In a reciprocating gun, ya 4recoil mechanism utilizing the gases of discharge to check 1 recoil and restore the gun to battery, a muzzle brake on the gun having'a series of baiiie rings arranged to deliver gases of discharge `to Vthe recoil mechanism, and a normally open valve in the path vof'deliveryV closed by s pressure in Vthe recoil mechanism.

'i' ,3. Inra reciprocating gun, a recoil mecha.- Y 'nism utilizing the gases of discharge to check 'recoil andrestore thev gun to battery, a muzzle bralire-on the gun arranged to deliverl gases of 4 discharge to the recoil mechanism, and a normally open Vvalve in the path of delivery i Vclosed by pressure in the recoil mechanism.

4. VIn a reclprocating gun, a recoil mechanism utilizing the gases of discharge to check Y recoil and restore the gun Ato battery, and a muzzle brake Von the -gun having a series of Y baffle rings arranged to deliver'gasesV of dis- 'charge to the recoll mechanism.

5. In avreciprocating gun, an imperforate `casing secured to the muzzle of the gun and having a rearwardly directed passage, a series' ofbaie rings 1n the casing,

being triangular in crossrsection Withv a c0nfcave base, laterally projecting lugs on the axially projecting an adjoining ring, gases of discharge Y lugs on the rings engaging Yand means for collecting rings engaging'the causing,

said rings 'Y cle for collecting the gases of discharge and A 

